US8201847B2 - Safety arrangement and a method of assembling a safety arrangement - Google Patents

Safety arrangement and a method of assembling a safety arrangement Download PDF

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Publication number
US8201847B2
US8201847B2 US12/304,228 US30422806A US8201847B2 US 8201847 B2 US8201847 B2 US 8201847B2 US 30422806 A US30422806 A US 30422806A US 8201847 B2 US8201847 B2 US 8201847B2
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United States
Prior art keywords
cover
housing
resilient arm
stop
horn
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US12/304,228
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US20100059971A1 (en
Inventor
Thierry Hondier
Rémi Baillivet
Fréderic Langlois
Samuel Vanzieleghem
Jérome Bertrand
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Autoliv Development AB
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Autoliv Development AB
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Assigned to AUTOLIV DEVELOPMENT AB reassignment AUTOLIV DEVELOPMENT AB ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BAILLIVET, REMI, HONDIER, THIERRY, BERTRAND, JEROME, LANGLOIS, FREDERIC, VANZIELEGHEM, SAMUEL
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q5/00—Arrangement or adaptation of acoustic signal devices
    • B60Q5/001—Switches therefor
    • B60Q5/003—Switches therefor mounted on the steering wheel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/203—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in steering wheels or steering columns
    • B60R21/2035—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in steering wheels or steering columns using modules containing inflator, bag and cover attachable to the steering wheel as a complete sub-unit
    • B60R21/2037—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in steering wheels or steering columns using modules containing inflator, bag and cover attachable to the steering wheel as a complete sub-unit the module or a major component thereof being yieldably mounted, e.g. for actuating the horn switch or for protecting the driver in a non-deployment situation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/215—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member
    • B60R21/2165—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member characterised by a tear line for defining a deployment opening
    • B60R21/21656—Steering wheel covers or similar cup-shaped covers

Definitions

  • the present invention relates to a safety arrangement, and more particularly to a safety arrangement comprising an air-bag housing for mounting to a steering wheel frame, a cover and a pair of horn contacts for actuating a vehicle horn, as well as a method for assembling such a safety arrangement.
  • driver air-bag in a motor vehicle for deployment, during a crash situation, to offer a level of protection to the driver of the motor vehicle.
  • driver air-bags are typically almost invariably stored, prior to deployment, in an air-bag housing mounted in the region of the hub of the steering wheel of the vehicle.
  • a cover which attaches to the air-bag housing to cover the housing.
  • the cover is generally designed to present a consistent external appearance with the remainder of the steering wheel, thereby giving a neat, “finished” appearance to the steering wheel.
  • the cover may nevertheless be configured to allow deployment of an air-bag from within the air-bag housing; for example, the cover may be provided with one or more “split-lines” which together form a break-away panel in the cover, allowing deployment of the air-bag through the cover during a crash impact.
  • the cover is generally mounted to the air-bag housing by means of one or more spring elements and the cover and housing are, additionally, hooked to one another.
  • the cover effectively “floats” on the housing and the cover may be depressed towards the housing, against the bias of the spring elements, to close the horn contacts and actuate the horn.
  • the spring elements act to return the cover to its initial position prior to depression, whilst the hooking engagement between the cover and housing ensures that the cover and housing do not become disconnected as the cover returns to its initial position prior to depression.
  • the arrangement is configured such that movement of the cover towards the housing to actuate the horn is nevertheless insufficient to allow unhooking of the cover from the housing (and therefore insufficient to allow the cover and housing to be hooked to one another in the case where the cover and housing are initially separate during assembly).
  • the cover and housing must first be hooked together and the horn assembly subsequently mounted between the cover and housing. Mounting of the horn assembly in situ in this manner is relatively complicated, and therefore undesirably time consuming and expensive.
  • a safety arrangement comprising:
  • a side wall of one of the cover and housing is provided with one or more apertures, and the other of said housing and cover is provided with a respective number of hook-shaped elements configured to engage with an edge of the respective aperture to hook the housing and cover to one another.
  • one of said horn contacts is carried on a resilient arm fixedly mounted with respect to the housing, the cover being supported on the resilient arm, whereby the cover is resiliently mounted to the housing, the resilient arm being configured such that, upon depression of the cover the resilient arm is pressed towards the housing to close said horn contacts, said resilient arm further acting to open the horn contacts upon release of the cover, thereby forcing the cover away from the housing.
  • the stop is biased towards said operable position.
  • the stop is biased by means of a coil spring.
  • the stop is mounted for lateral movement between said operable and assembly positions.
  • the stop is slidably mounted to the cover or housing for lateral sliding movement between said operable position and said assembly position.
  • the stop is in the form of a carriage slidably mounted to the housing for lateral sliding movement between said operable position and said assembly position, a first horn contact being mounted on the carriage.
  • the other of said horn contacts is carried on a resilient arm fixedly mounted to the carriage, the resilient arm supporting said cover when said carriage is in the operable position, whereby the cover is resiliently mounted to the housing, the resilient arm being configured such that, upon depression of the cover with the carriage in said operable position, the resilient arm is pressed towards the housing to close said horn contacts, said resilient arm further acting to open the horn contacts upon release of the cover, thereby forcing the cover away from the housing.
  • the stop is mounted for movement along the axis of depression of said cover.
  • the stop is biased toward said operable position to arrest relative movement of the cover towards the housing upon depression of the cover during normal operation to activate said vehicle horn, the strength of said biasing nevertheless allowing relative movement of the cover and housing toward one another, upon sufficient application of force to depress the cover, whereby the stop may be forcibly moved into said assembly position, against said biasing, for disconnection of the cover and housing.
  • stop is in the form of a retractable actuator element mounted to one of said housing or cover, the retractable actuator element being biased towards a non-retracted operable position projecting between the housing and cover, and forcibly retractable into the assembly position, against the action of said bias.
  • the actuator element is mounted to the cover and biased towards said non-retracted position by means of a coil spring, one of said horn contacts being carried on a resilient arm fixedly mounted to the housing, the actuator element being supported on the resilient arm, whereby the cover is resiliently mounted to the housing, the resilient arm being configured such that, upon depression of the cover the resilient arm is pressed towards the housing by the actuator element to close said horn contacts, said resilient arm further acting to open the horn contacts upon release of the cover, thereby forcing the actuator element and cover away from the housing.
  • the stop is in the form of an abutment member pivotally mounted to the housing, the abutment member being biased towards said operable position, and forcibly pivotable into said assembly position, against the action of said bias.
  • the abutment member is biased towards said operable position by means of a coil spring, one of said horn contacts being carried on a resilient arm fixedly mounted to the abutment member, the cover being supported on the resilient arm whereby the cover is resiliently mounted to the housing, the resilient arm being configured such that, upon depression of the cover the resilient arm is pressed towards the housing by the cover to close said horn contacts, said resilient arm further acting to open the horn contacts upon release of the cover, thereby forcing the cover away from the housing.
  • the housing incorporates a mounting base, distal from said cover, for mounting the arrangement to a given steering wheel frame, the cover incorporating a side wall which extends downwardly alongside the airbag housing and terminates at a lower edge, said lower edge being spaced a distance above the mounting base such that, when the arrangement is mounted to the steering wheel frame, said lower edge of said side wall acts as a secondary stop by abutting against the steering wheel frame upon sufficient depression of the cover towards the housing, thereby preventing said un-hooking of the cover and housing.
  • the arrangement further comprises a locking mechanism for locking the stop in said operable position.
  • a method of assembling a safety arrangement comprising an airbag housing for mounting to a steering wheel frame, a cover and a pair of horn contacts for actuating a vehicle horn, the method comprising the steps of:
  • FIG. 1 is a perspective view showing a first embodiment of safety arrangement according to the present invention:
  • FIG. 2 is a perspective view showing part of the safety arrangement of FIG. 1 ;
  • FIGS. 3A , 3 B AND 3 C are schematic, cross-sectional views illustrating aspects of operation of the safety arrangement of FIG. 1 ;
  • FIG. 4 is a perspective view showing a further embodiment of a safety arrangement according to the present invention.
  • FIGS. 5A AND 5B are schematic, cross-sectional views illustrating aspects of operation of the safety arrangement of FIG. 4 ;
  • FIG. 6 is a perspective view showing a further embodiment of a safety arrangement according to the present invention.
  • FIGS. 7A AND 7B are schematic, cross-sectional views illustrating aspects of operation of the safety arrangement of FIG. 6 ;
  • FIGS. 8A AND 8B are schematic, cross-sectional views showing part of a safety arrangement in accordance with a yet further aspect of the present invention.
  • FIG. 1 shows a safety arrangement 1 comprising an airbag housing 2 , configured to contain a folded airbag (not shown), and a cover 3 .
  • the specific external shape of the airbag housing 2 is somewhat complex, to enable the housing 2 to accommodate various components associated with deployment and control of the airbag.
  • a detailed description of the specific shape of the housing 2 is not necessary for a full understanding of the present invention. Suffice to say, for the time being, that the housing 2 has a generally triangular cross-section and incorporates a mounting base 2 a , which allows the housing 2 to be mounted to a given steering wheel (not shown), and two pairs of downwardly directed hook-elements 2 b (of which only one pair can be seen clearly in FIG. 1 ) provided on respective sidewalls of the housing 2 (see also FIG. 2 ).
  • the cover 3 comprises a generally triangular, planar body portion 3 a defining three “lobes” 3 b , and a pair of side walls 3 c (of which only one is shown in FIG. 1 ), each sidewall 3 c extending downwardly from the periphery of the body portion 3 a between a respective pair of the lobes 3 b , and incorporating a pair of generally rectangular apertures 3 d which receive the respective hook-elements 2 b therethrough in a snap-fit to hook the cover 3 to the housing 2 . It will be appreciated that, with the hook elements 2 b engaged with the lower edge of the respective apertures 3 d , the cover 3 and housing 2 are prevented from being pulled apart from one another.
  • the cover 3 may, for example, be formed of any suitable plastics material, and is preferably formed to match the relevant steering wheel on which the housing is mounted.
  • the lobes 3 b are configured such that when the housing is mounted at the hub of a suitable steering wheel frame comprising three spokes, the lobes will align with the spokes to create a neat finish to the hub region of the steering wheel.
  • the safety arrangement 1 is further provided with three identical horn assemblies, of which two are indicated generally at 4 in FIG. 1 (the third horn assembly being obscured in FIG. 1 by the housing 2 ).
  • one of the horn assemblies 4 is shown in more detail.
  • the horn assembly 4 comprises a stepped support platform 5 projecting outwardly from the main body of the housing portion 2 and comprising a lower tier 5 a extending generally horizontally along the main body of the housing 2 , a sloping step portion 5 b extending upwardly from one end of the lower tier portion 5 a , and an upper tier portion 5 c extending generally horizontally from the upper end of the sloping portion 5 b , generally parallel with the lower tier 5 a.
  • a first horn contact 6 is mounted on the upper surface of the lower tier portion 5 a of the support platform 5 , the first horn contact being connected to a horn activation circuit (not shown) by means of a wire 7 .
  • a resilient arm 8 here in the form of a thin resilient strip of metal, is mounted to the upper surface of the upper tier portion 5 c of the support platform 5 , the resilient arm 8 extending generally horizontally over the lower tier 5 a and terminating at a free end 8 a spaced directly above the first horn contact 6 .
  • the resilient arm 8 carries a second horn contact 9 , mounted to the free end 8 a of the resilient arm 8 , the second horn contact 9 being connected to the aforementioned horn activation circuit by means of a wire 10 .
  • the horn contacts 6 , 9 therefore represent a pair of horn contacts which may be closed (that is, brought into contact with one another) to close the associated horn circuit and activate the vehicle horn.
  • the resilient arm 8 in turn supports a retractable actuator element in the form of a generally cylindrical member 11 positioned directly above the horn contact 6 and extending upwardly towards the underside of the cover 3 .
  • the cylindrical member 11 is slidably received in the manner of a piston, within a corresponding generally cylindrical boss 12 which is fixedly attached to the underside of the cover 3 , by means of bolts 13 .
  • the cylindrical member 11 is retained within the boss 12 by means of a key 11 a provided on the cylindrical member 11 , the key 11 a being slidably received within a corresponding blind key-way 12 a extending part-way down the wall of the boss portion 12 .
  • a locking mechanism is provided at the lower end of the key-way 12 a , the locking mechanism comprising a recess 12 b cut-out from the key-way 12 a , whereby the cylindrical member 11 may be locked in the non-retracted position by rotating the cylindrical member 11 within the boss 12 such that the key 11 a engages the cut-out recess in the key-way 12 a.
  • a coil spring 14 is provided within the boss portion 12 to bias the cylindrical member towards a non-retracted position (whereby the key 11 a abuts against the lower edge of the blind key-way 12 a ), the cylindrical member being slidable against the bias of the coil spring 14 into a retracted position within the boss 12 .
  • the cover 3 is effectively resiliently supported by the resilient arm 8 (via the cylindrical member 11 ) so that the cover 3 is resiliently mounted on the housing.
  • the cover will effectively “float” directly on the corresponding plurality of resilient arms.
  • FIGS. 3 a , 3 b and 3 c the operation of the safety assembly shown in FIGS. 1 and 2 will now be described.
  • FIGS. 3 a , 3 b and 3 c are intended only as schematic representations illustrating operation of the safety arrangement in accordance with the present invention.
  • certain features shown in FIGS. 1 and 2 have been greatly simplified or stylized for clarity; in particular, in FIGS. 3 a , 3 b and 3 c , the pair of hook elements 2 b is shown in the same cross section as the horn assembly 4 , in contrast to the actual relative position of the hook elements 2 b and horn assembly 4 shown in FIGS. 1 and 2 .
  • the safety arrangement is shown, in part, prior to depression of the cover 3 to activate the horn, with cover 3 resiliently mounted on the resilient arm 8 , by means of the non-retracted cylindrical member 11 .
  • a vehicle occupant will depress the cover 3 , as indicated by the arrow A in FIG. 3 a .
  • the cylinder member 11 presses down on the resilient arm 8 and, provided the coil spring is selected to be sufficiently ‘strong’ (relative to the resilient arm 8 ), the cylinder member 11 bends the resilient arm 8 downwardly to move the horn contact 9 into engagement with the horn contact 6 , as shown in FIG. 3 b , thereby closing the horn contacts 6 , 9 and activating the vehicle horn.
  • the cylindrical member 11 will act as a stop, arresting further movement of the cover 3 towards the housing 2 , beyond the aforementioned distance x. In this manner, it is to be appreciated that the cylindrical member 11 acts as a stop which, in the operable (non-retracted) position shown in FIGS. 3 a and 3 b , arrests relative movement of the cover 3 towards the housing 2 so as to prevent un-hooking of the cover 3 from the housing 2 .
  • FIG. 3 c illustrates operation of the safety arrangement to specifically allow un-hooking of the cover 3 from the housing 2 .
  • sufficient downward force may be applied to the cover 3 to compress the coil spring 14 between the cover 3 and the housing 2 (after the horn contacts 6 , 9 are initially closed), thereby forcibly retracting the cylindrical member 11 , relative to the cover 3 , into an assembly position as shown in FIG. 3 c.
  • the cover 3 may first be resiliently mounted on the housing 2 by locating the cylindrical member 11 on the respective resilient arm 8 , such that the cover 3 “floats” on the housing 2 .
  • the cover 3 may then be depressed towards the housing 2 in the manner described above, using sufficient force to forcibly retract the cylindrical member 11 into the assembly position, whereby the cover 3 and housing 2 may be conveniently hooked to one another (via hook elements 2 b and apertures 3 d ).
  • the cover may then be released to adopt the position shown in FIG. 3 a , after which time the safety arrangement may be operated in accordance with FIGS. 3 a to 3 c , as set out above.
  • the cover 3 and housing 2 can be mounted to one another with the horn assembly 4 already assembled and mounted to the housing, thereby preventing the need to build the horn assembly 4 in situ after hooking of the cover 3 to the housing 2 .
  • FIG. 4 a yet further embodiment of a safety arrangement is shown.
  • FIG. 4 is similar in some respects to the embodiment already described with reference to FIGS. 1 to 3 , and for clarity the same reference numerals have therefore been used to denote common features.
  • an abutment member in the form of an elongate element 15 is pivotally mounted to the housing 2 at a pivot point 16 , the elongate element 15 being biased towards an operable, generally horizontal position by means of a coil spring 17 (see also FIGS. 4 a and 4 b ), which engages with the underside of the elongate element 15 remote from the pivot point 16 .
  • a locking mechanism may be provided, for example in the form of catch (See FIG. 5 a ), to lock the elongate element 15 in the operable position.
  • the upper surface of the elongate element 15 incorporates a lower tier 15 a extending generally horizontally along the main body of the housing 2 , a sloping step portion 15 b extending upwardly from one end of the lower tier portion 15 a , and an upper tier portion 15 c extending generally horizontally from the upper end of the sloping portion 15 b , generally parallel with the lower tier 15 a.
  • a horn contact 6 is mounted on the lower tier 15 a of the upper surface of the elongate element 15 , the horn contact 6 being connected to a horn activation circuit (not shown) by means of a wire.
  • a resilient arm 8 is mounted on the upper tier 15 c of the upper surface of the elongate element 15 , the resilient arm 8 extending generally horizontally over the lower tier 15 a and terminating at a free end 8 a spaced directly above the first horn contact 6 .
  • the resilient arm 8 carries a second horn contact 9 , mounted to the free end 8 a of the resilient arm 8 , the second horn contact 9 being connected to the aforementioned horn activation circuit by means of a wire.
  • the resilient arm 8 directly supports the underside 18 of the cover 3 .
  • the cover 3 is effectively resiliently supported by the resilient arm 8 .
  • the cover 3 is resiliently mounted on the housing 2 and, where a plurality of such horn assemblies is provided (such that there is a respective plurality of resilient arms) the cover 3 will effectively “float” directly on the corresponding plurality of resilient arms.
  • FIGS. 5 a and 5 b are intended only as schematic representations illustrating operation of the safety arrangement in accordance with the present invention. Thus, certain features shown in FIGS. 5 a and 5 b have been greatly simplified or stylized for clarity.
  • the safety arrangement is shown, in part, prior to depression of the cover 3 to activate the horn, with cover 3 resiliently mounted on the resilient arm 8 .
  • the underside 18 of the cover 3 presses down on the resilient arm 8 , bending the resilient arm 8 downwardly to move the horn contact 9 into engagement with the horn contact 6 .
  • the coil spring 17 is selected to be sufficiently strong (relative to the resilient arm 8 )
  • the underside 18 of the cover 3 bends the resilient arm 8 downwardly to move the horn contact 9 into engagement with the horn contact 6 , thereby closing the horn contacts 6 , 9 and activating the horn.
  • the elongate element 15 will arrest further movement of the cover 3 towards the housing 2 .
  • the elongate element 15 acts as a stop which, in the operable (horizontal) position shown in FIG. 5 a , arrests relative movement of the cover 3 towards the housing 2 so as to prevent un-hooking of the cover 3 from the housing 2 .
  • FIG. 5 b illustrates operation of the safety arrangement to specifically allow un-hooking of the cover 3 from the housing 2 .
  • the cover 3 may first be resiliently mounted on the housing 2 by locating the underside 18 of the cover 3 on the respective resilient arm 8 , such that the cover 3 “floats” on the housing 2 .
  • the cover 3 may then be depressed towards the housing 2 in the manner described above, using sufficient force to forcibly rotate the elongate element 15 into the assembly position, whereby the cover 3 and housing 2 may be conveniently hooked to one another (via hook elements 2 b and apertures 3 d ).
  • the cover may then be released to adopt the position shown in FIG. 5 a , after which time the safety arrangement may be operated in accordance with FIGS.
  • the cover 3 and housing 2 can be mounted to one another with the horn assemblies 4 already assembled and mounted to the housing, thereby preventing the need to build the horn assembly in situ after hooking of the cover 3 to the housing 2 .
  • FIG. 6 shows an alternative embodiment of a safety arrangement in accordance with the present invention, wherein the stop is mounted for lateral movement between an operable position and an assembly position.
  • the embodiment shown in FIG. 6 is similar in some respects to the embodiment already described with reference to FIGS. 1 to 5 , and for clarity the same reference numerals have therefore been used to denote common features.
  • the housing 2 incorporates a generally flat support platform 19 .
  • a guide panel 20 extends upwardly from the outer peripheral edge of the platform 19 , the guide panel 20 being generally rectangular in shape and incorporating a guide channel 20 a cut from its lower edge, adjacent the peripheral outer edge of the platform 19 .
  • a generally box-shaped carriage 21 is slidably mounted on the platform 19 by means of a key portion 21 a slidably received within the guide channel 20 a , and a bearing portion 21 b , which slidably engages with the upper edge of the guide panel 20 .
  • the carriage 21 incorporates a stepped upper surface comprising a generally horizontal lower tier 21 c and a generally horizontal upper tier 21 d .
  • a horn contact 6 is fixedly mounted on the lower tier 21 c of the carriage, the horn contact 6 being connected to a horn activation circuit (not shown) by means of a wire (not shown).
  • a resilient arm 8 is fixedly mounted on the upper tier 21 d , the resilient arm 8 extending generally horizontally over the lower tier 21 c and terminating at a free end 8 a spaced directly above the first horn contact 6 .
  • the resilient arm 8 carries a second horn contact 9 , mounted to the free end 8 a of the resilient arm 8 , the second horn contact 9 being connected to the aforementioned horn activation circuit by means of a wire (not shown).
  • the resilient arm 8 directly supports the underside 22 of the cover 3 .
  • the cover 3 is resiliently mounted on the housing 2 where a plurality of resilient arms 8 is provided (each corresponding to a respective one of a plurality of horn assemblies), the cover 3 will effectively ‘float’ directly on the corresponding plurality of resilient arms.
  • FIGS. 7 a and 7 b are intended only as schematic representations illustrating operation of the safety arrangement in accordance with the present invention. Thus, certain features shown in FIG. 5 have been greatly simplified or stylized for clarity.
  • the safety arrangement is shown, in part, prior to depression of the cover 3 to activate the horn, with the carriage 21 in an operable position, in which the underside 22 of the cover 3 is resiliently mounted on the resilient arm 8 .
  • the underside 22 of the cover 3 presses down on the resilient arm 8 , bending the resilient arm 8 downwardly to move the horn contact 9 into engagement with the horn contact 6 , thereby closing the horn contacts 6 , 9 and activating the horn.
  • FIG. 7 b illustrates operation of the safety arrangement to specifically allow un-hooking of the cover 3 from the housing 2 .
  • the carriage 21 is slidingly moved from the operable position shown in FIG. 5 a to the assembly position shown in FIG. 7 b , whereby the cover 3 is free to move downwardly towards the housing 2 , as shown in FIG. 5 b .
  • the hook elements 2 b can then be disengaged from the side wall 3 c of the cover 3 . Un-hooking of the cover 3 and housing 2 in this manner allows disconnection of the cover 3 from the housing.
  • a locking mechanism may be provided, for example in the form of catches 26 , to lock the carriage 21 in either the operable or assembly position.
  • the carriage 21 may be moved into the aforementioned assembly position, and the cover 3 and housing 2 subsequently hooked together. Once the cover 3 and housing 2 have been hooked to one another, the carriage may then be moved into the aforementioned operable position, whereby the resilient arm 8 supports the cover 3 , and cover 3 is resiliently mounted to the housing 2 after which time the safety arrangement may be operated in accordance with FIGS. 7 a and 7 b .
  • the cover 3 and housing 2 can be mounted to one another with the horn assemblies 4 already assembled and mounted to the housing, thereby preventing the need to build the horn assembly in situ after hooking of the cover 3 to the housing 2 .
  • a safety arrangement according to the present invention may optionally be provided with an additional, secondary stop for preventing undesired un-hooking of the cover and housing.
  • an additional, secondary stop for preventing undesired un-hooking of the cover and housing.
  • Specific features other than those associated with operation of the secondary stop have been omitted from FIGS. 8 a and 8 b for clarity, but it will be appreciated, for example, that the secondary stop may optionally be incorporated into any of the embodiments described above.
  • the housing 2 is shown mounted to a steering wheel frame 23 .
  • the cover 3 is provided with a side wall 24 (which may correspond to the side wall 3 c described above) extending downwardly alongside the housing 2 and terminating in a lower edge 24 a.
  • the distance w between the lower edge 24 a and the steering wheel frame 23 whilst being selected so as to allow movement of the cover towards the housing to close the associated horn contacts is less than the distance z between the lower edge of the hook element 2 b and the lower edge of the apertures 3 d (of which only one is shown in FIG. 8 a ).
  • the lower edge 24 a upon depression of the cover 3 , the lower edge 24 a will abut against the steering wheel frame 23 (arresting movement of the cover 3 towards the housing 2 ) before the lower edge of the hook elements 2 b can clear the lower edge of the respective apertures 3 d .
  • the lower edge 24 a is spaced above the mounting base 2 a so as to act as a secondary stop, when the housing 2 is mounted to the steering wheel frame 23 , by abutting against the steering wheel frame 23 as the cover 3 is depressed towards the housing 2 .
  • a secondary stop may be particularly desirable where the (primary) stop is biased against axial movement along the direction of depression of the cover (for example cylindrical element 11 or carriage 21 ), but is not locked, in which case even if the cover is accidentally pressed with sufficient force to move the (primary) stop, the secondary stop will still act to prevent unhooking of the cover and housing.
  • the cover and housing may be hooked to one another in all manner of alternative ways, provided the hooking prevents disconnection of the cover and housing.
  • the hook elements might alternatively be attached to the cover, whilst the housing might incorporate the respective apertures for engaging the hook elements. In such circumstances, it will be appreciated that the hook elements will be upwardly directed.
  • the stop might alternatively be mounted on the housing (for example in the case of the retractable cylindrical element 11 , in which case the horn contacts 6 , 9 and resilient arm 8 would be fixedly mounted to the cover 3 ) or the cover (for example in the case of the elongate element 15 or carriage 21 ).
  • cover 3 need not be resiliently mounted on the resilient arm 8 , but may in fact ‘float’ on a separate resilient mounting means, for example a separate coil spring or set of coil springs.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Air Bags (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Steering Controls (AREA)
US12/304,228 2006-06-15 2006-06-15 Safety arrangement and a method of assembling a safety arrangement Active 2027-10-19 US8201847B2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SE2006/000708 WO2007145549A1 (en) 2006-06-15 2006-06-15 A safety arrangement and a method of assembling a safety arrangement

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US20100059971A1 US20100059971A1 (en) 2010-03-11
US8201847B2 true US8201847B2 (en) 2012-06-19

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US (1) US8201847B2 (de)
EP (1) EP2026995B1 (de)
JP (1) JP5095732B2 (de)
CN (1) CN101466573B (de)
AT (1) ATE485974T1 (de)
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DE102008023004B4 (de) 2008-05-09 2014-04-03 Autoliv Development Ab Hupenaktivierungseinrichtung sowie Sicherheitseinrichtung mit einer solchen Hupenaktivierungseinrichtung
DE102009043372B4 (de) 2009-09-29 2014-03-13 Autoliv Development Ab Hupenaktivierungseinrichtung und Sicherheitsanordnung mit einer Hupenaktivierungseinrichtung
DE102010007569B4 (de) * 2010-02-10 2014-04-30 Autoliv Development Ab Sicherheitsanordnung
DE102010008159A1 (de) 2010-02-16 2011-09-08 Autoliv Development Ab Hupenaktivierungseinrichtung
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KR102064001B1 (ko) * 2013-06-04 2020-01-08 현대모비스 주식회사 자동차 에어백
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ATE485974T1 (de) 2010-11-15
WO2007145549A1 (en) 2007-12-21
DE602006017898D1 (de) 2010-12-09
CN101466573B (zh) 2011-05-11
JP5095732B2 (ja) 2012-12-12
WO2007145549A8 (en) 2008-12-04
JP2009539699A (ja) 2009-11-19
EP2026995A1 (de) 2009-02-25
US20100059971A1 (en) 2010-03-11
CN101466573A (zh) 2009-06-24
EP2026995B1 (de) 2010-10-27

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